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A coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of -.25.The other end of this coil is wrapped around a core with 15 turns.How many turns must a second coil wrapped around the same coil have to produce an output voltage of 25 volts?
Two thermal reservoirs are connected by a solid copper bar. The bar is 3 m long, and the temperatures of the reservoirs are 63.0°C and 32.0°C. What is the rate of heat flow through the bar
Two bicycle tires are set rolling with the equivalent initial speed of 5.0 m/s along a long, straight road, and distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 {rm psi} and goes the dist..
What is the mean number density of galaxies within the half mass radius? Suppose the typical physical cross section of a galaxy is 10^-3 Mpc^2
The position of a 900 kg boulder's center of mass has been decided to within an uncertainty of 1.0 nm. What is the minimum uncertainty in the boulder's velocity?
White light is incident on a soap film (n = 1.30) in air. The reflected light looks bluish because the red light (? = 695 nm) is absent in the reflection, What is the minimum thickness of the soap film
A rectangular loop of wire lies in the plane formed by the line y=x and the z-axis. The square has area of 280cm^2 so that A= (39.6i - 39.6j) x 10^-3. A magnetic field B= 0.32T points in the negative x direction.
A 35kg child slides down a playground slide at aconstant speed, The slide has a height of 4.0mand is 7.4m long, find the magnitude of the kinetic friction force acting on the child
On planet Tehar, the free-fall acceleration is the same as that on Earth, however there is also a strong downward electric field that is uniform close to the planet's surface. A 2.02 kg ball having a charge of 5.01 µC is thrown upward at a speed of 2..
A cubical block of ice 56.0 cm on an edge is placed on a level floor over a speck of dust. How many cm below the upper surface of the ice
An engraver uses a magnifying glass (f = 8.80 cm) to examine some work, as in the drawing. What is the distance between the work and the magnifying glass
An automobile engine takes in 4000 J of heat and performs 1100 J of mechanical work in each cycle. How much heat is "wasted" in each cycle
A space probe is traveling in outer space with a momentum that has a magnitude of 7.80 107 kg · m/s. Determine the momentum of the probe after the retrorocket ceases to fire
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